Question: what is the  date of birth of Chlohar II in the statement with Gregorian date earlier than 1584} ?
Paraphrase: On what date, prior to 1584, was the birth of Chlohar II?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q209118 p:P569 ?s . ?s ps:P569 ?obj . ?s pq:P31 wd:Q26961029 }